Expected behavior

Usually I was adding:

maxPriorityFeePerGas: null, maxFeePerGas: null

to the send object and with this it was skip the site suggest and going directly on market suggested by metamask, moved now to 4.9.0 and by reading the documentation I see it should be:

maxPriorityFeePerGas: undefined, maxFeePerGas: undefined

Actual behavior

Despite the "fix" metamask still receive a wrong site suggested fee, while I was expecting to not have the site suggested fee at all.